code: def cpp_function(function_name: str):
      """Define a Cpp function.
  
      Args:
          function_name: Cpp function name.
      """
      from ray.remote_function import RemoteFunction
  
      return RemoteFunction(
          Language.CPP,
          lambda *args, **kwargs: None,
          CppFunctionDescriptor(function_name, "PYTHON"),
          {},
      )
  
file_path: ray/python/ray/cross_language.py
imports: from __future__ import absolute_import, division, print_function
  from ray import Language
  from ray._raylet import CppFunctionDescriptor, JavaFunctionDescriptor
  from ray.util.annotations import PublicAPI
label_desc: Use image node_id 2 for calling a global function with example usage: cpp_function(function_name) and returns: RemoteFunction